In the BSS guide, it is recommended to donk bet (bet/fold) a medium made hand without position, if I recall correctly. That's what I did in this hand, but had to fold after the check raise of the villain.

Most likely I would have played the same way, with Check/Call you wont find out where you stand, Check/Raise in multiway pot we might just put ourselves into trouble and Check/Folding is anyways a bit too weak while there might even be worse pairs/draws. Also as we Bet it I don't see how we can continue either, we most likely are beaten. Nice hand!